/Engine/Source/Editor/PropertyEditor/Public/IDetailChildrenBuilder.h
Adds a property from a custom structure as a child
[IDetailPropertyRow](API\Editor\PropertyEditor\IDetailPropertyRow) * AddExternalStructureProperty ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FStructOnScope](API\Runtime\CoreUObject\UObject\FStructOnScope) > ChildStructure, [FName](API\Runtime\Core\UObject\FName) PropertyName, const [FAddPropertyParams](API\Editor\PropertyEditor\FAddPropertyParams) & Params )